Paint



' 85 sulphate, barium carbonate, infusorial earth, asto be made I may use 3099 Per cent of titanium Patented Jan. 17, 19 39 I I UNITED STATES PATENT OFFICE 7 PAINT Waldemar Roohadze, Chicago, 111., asoignor to Brown-Lindsay Paint Company, a corporation of Illinois No Drawing. Application June 22, 1936, Serial No. 86,697

3 Claims. (Cl. 134-39) My invention relates to paint and more par- The disagreeable odors of paints are caused ticularly to an odorless paint. principally by the solvents. The vapors oi. the Paints consist of finely ground pigments, mixed solvents used in paint, besides being disagreeable with suitable vehicles and suflicient driers. The in odor, frequently are toxic to human beings.

'5 paint vehicles now known to the art comprise Then, too, certain foods such as butter, have the various oils such as linseed oil, soya' bean oil, property of absorbing the vapors. In hospitals, China-wood oil, Perilla oil, fish oil, corn oil, or the wards and rooms must be cleared for paintpine oil, admixed with various proportions of ing as the odor of drying paint has been known solvents such as turpentine, benzine, benzol, to work injury to patients.

10 toluol, and various fractions of petroleum and One object of my invention is to provide an m asphalt oils which have about the same specific odorless paint which can be used in food stores, gravity as turpentine. Pigments are various inhospitals, restaurants, dairies, and hotels. organic compounds such as white lead, lead sul- In general, my invention contemplates the use phite, lead sulphate, zinc oxide, hydrated oxide of a deodorized solvent, namely a hydrocarbon of zinc, barium sulphate, titanium oxide, titaniof the kerosene boiling range or lower, which has 15 dioxide, yellow lead oxide, red lead, blue been *deodoroized by the action of fuming sullead, Venetian red (a ferric oxide containing phuric acid, followed by filtration through suitgypsum), Indian red (native oxide of iron), able mediums, as for example activated clays, quicksilver vermilion (amorphous mercury suldiatomaceous earths, or activated carbons.

phide made with sulphur in the presence of an More particularly, in order that my invention 20 alkaline solution), permanent vermilion (orange may be more fully understood, I give the folmineral tinted with paranitraniline), helio fast lowing example of a paint made in accordance red (nitro-para toluidine), lithol red, burnt siwith my invention, it being remembered that the enna, burnt umber, burnt ochre, Prince's minexample is by way of illustration only and not'by l5 eral brown, Van Dyke brown, ochre (hydrated way of limitation.. In the following formula, the u oxide of iron), chrome yellow (lead chromate), percentages are given by weight: zinc chromate, cadmium sulphides, cadmium selenides, ultra marine blue, cobalt blue, Prus- 52:23: 5: sian blue (ferri-ferro cyanide of ir n). chrome Percent 55; B 1E5]; H 23 97 green, ChrOmium Oxide. glfie aniline lakes zinc Percent drying oils -w 80 green (chromate of zinc and Prussian blue) Percent driers- .:::IIIIIIIZ: 3:55

per green (bicarbonate of copper), lamp black, carbon black, drop black, black toner, benzol In e above ormula, any suitable pigment black, acetylene black, mineral black, barium may be usedp if Whlte enamel 1S bestos, calcium carbonate, gypsum (calcium Oxide With Percent Of Zinc B- h s sulphate), may be of any suitable type, as for example In compounding paints, suitable quantities of Damar gum, Congo Manilla 8 other pigments are mixed with a suitable vehicle, tofossil gums. y of the Synt etic gums Such as 40 gather with dri It i assumed t t driers phenol condensation products, esterized resins, exert no chemical action but attract oxygen from chlorinated rubber gums- Inasmuch as the above the air by virtue of their presence, acting in the formula is for an enamel, e we are added to nature of catalytic agents. The principal driers give the gloss and to serve the further Purpose Of used in paint are metallic oaps usually acting as protective colloids, serving to keep the posed of lead and manganese in the form of pigments 51151381151011- 45 linoleates or resinates. Too much drier is harmdrying s l s ed above may be any of the in], but a limited amount serves t purpose of known drying oils such as kettled linseed oil, rape permitting th paint, t dry befor dust can L seed oil, hemp seed oil, soya bean oil, or tung oil. lect. Lakes are dyes precipitated on a transpar- The driers may be of any suitable p I ent base and are, of themselves, more or less may for example a mixture of lead naphtransparent or translucent. There are two kinds thenaife zinc naphthenate and cobalt naphthe' 50 of lakes, those made from aniline dyes and those nate m the following proportions:

made from wood dyes. Enamels formerly em- Percent lead naphthenate 1.55 braced that class of paints composed of pigments Percent zinc naphthenate 1.55

56 ground in varnish, which dried with a high gloss. Percent of cobalt naphthenate .45

The lead naphthenate appears to act as a "bottom drier", that is, it tends to cause polymerization of the film from that portion adjacent the surface upon which the paint is applied. The nobalt naphthenate acts as a surface drier and tends to cause catalytic oxidation or polymerization of the surface of the gums. while the zinc naphthenate keeps the film open or spongy and prevents wrinkled areas. Iron naphthenate driers may be used in the darker colored paints. The solvent used above is the important part of my invention and, as pointed out hereinbefore, comprises a hydrocarbon oil of about the boiling range of kerosene, which has been deodorized by contacting it with fuming sulphuric acid and filtering it through activated filtering mediums. The solvent is not quite as volatile as some of the other solvents used. but I have been able to compound a paint which will dry nicely within eight to fourteen hours.

If a flatter paint is desired, a larger percentage of pigment and of solvent is employed with a smaller percentage of gums which, as-pointed out above, impart the gloss to the paint, characterizing it as an enamel".

It will be observed that I have accomplished the objects of my invention. I have produced a paint which is substantially odorless and which can be used, without disadvantage, in food stores, restaurants, dairies, hospitals, and the like, and in homes where the odor of paint is objectionable. The hydrocarbon solvent thus treated appears to be non-toxicand no ill eflects are had from the presence of the hydrocarbon vapors which result by evaporation when the paint is drying.

It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of my claims. It is further obvious that various changes may be made in details within the scope of my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described.

Having thus described my invention, what I claim is:

1. A paint consisting of a pigment, gums, driers, and a deodorized hydrocarbon solvent.

2. In a paint, a solvent consisting of deodorized hydrocarbon solvent boiling within the kerosene boiling range.

' 3. A paint having substantially the following formula by weight:

Percent Pigment 35. 60 Gums 18. 44 Deodorized hydrocarbon solvent 23. 97 Drying o 18. 44 Metallic naphthenate driers 3.

WALDEMAR ROOHADZE. 

